JPH0959971A - Joint structure of pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a component having lightweight simple structure particularly, and to connect a pile with excellent workability in joint structure connecting a bearing pile driven into the ground. SOLUTION: End plates 3, 4 are connected at the pile ends of an upper pile 1 and a lower pile 2 respectively, and projecting strip sections 3a, 4a are protruded integrally from the outer circumferential sections of these end plates 3, 4. A plurality of split rings 6 having lateral grooves 7, into which a pair of the projecting strip sections 3, 4 can be inserted, in inner circumferential surfaces are fitted onto the outer circumferential surfaces of the end plates 3, 4 while the projecting strip sections 3a, 4a are put into the lateral grooves 7. Projecting pieces are protruded from each split end section of the split rings 6, and a pair of the adjacent projecting pieces are inserted into the vertical grooves 10 of socket members 9 abutted against the external surfaces of the projecting pieces, and each split ring 6 is connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for concrete piles or the like placed in the ground, and more particularly to a joint structure for a pile having a lightweight and simple structure and excellent workability. .

[0002]

2. Description of the Related Art As a conventional pile joint structure of this type,
For example, Japanese Utility Model Publication No. 6-47965, Japanese Utility Model Publication No. 5-813.
No. 26 publication or the technique shown in FIGS. 8 and 9 is known. The structure of the piles of these known technologies is the upper pile 51.
End plates 53 and 54 are attached to the upper and lower end surfaces of the lower pile 52 and the lower pile 52, respectively, and projecting ridges 55 are provided so as to project from the outer peripheral surfaces of these end plates 53 and 54, or the outer peripheral surfaces of the end plates 53 and 54 The ring blocks 56 and 57 attached to the respective outer peripheral surfaces of the ring blocks 56 and 57 have projecting ridges 58 projecting therefrom.

Further, a split ring 59 formed by splitting the ring body into a plurality of pieces was fitted around the outer periphery of the connecting portion between the upper pile 51 and the lower pile 52. These split rings 5
The outer peripheral surface of 9 is provided with a taper surface which is inclined in the axial direction of the pile, and the inner peripheral surface thereof is provided with a lateral groove 60 into which the protrusions 55 and 58 can be fitted.

A cylindrical outer ring 61 is fitted around the combined split ring 59. This outer ring 61
A taper surface corresponding to the taper surface of the outer peripheral surface of the split ring 59 is provided on the inner peripheral surface of, and when the outer ring 61 is fitted around the combined split ring 59, a plurality of tapered surfaces are provided. The split ring 59 is tightened with the outer ring 61, and the end plates 53 and 54 provided at the pile ends of the upper pile 51 and the lower pile 52 are strongly attracted, and the upper pile 51 and the lower pile 52 are fixed to each other by crimping. Was configured to be able to.

[0005]

However, in the above-mentioned pile joint structure of the known art, the lower pile 52 is penetrated into the outer ring 61 before the work of connecting the upper and lower piles 51 and 52 is performed. The outer ring 61 had to be attached around the lower pile 52. By the way, this outer ring 6
Since No. 1 has a weight of 5 to 14 kgf, there is a problem that its labor and labor are troublesome. Further, when connecting the piles, it is necessary to lift the heavy outer ring 61 and forcefully fit the ring around the split ring 59, which causes a problem of poor workability.

Further, when the outer ring 61 is attached around the lower pile 52 in advance, there is a problem that the taper provided on the inner peripheral surface of the outer ring 61 is inserted with the wrong inclination. In this case, the outer ring 61 has to be replaced and the like, so that there is a problem that the work is difficult.

The pile joint structure according to the present invention is a completely new technique developed in view of the above-mentioned many problems of the prior art, and in particular, the projecting pieces projecting from each split end of the split ring are predetermined. The present invention provides a technology for a pile joint structure in which a plurality of split rings can be tightened and attached around the connecting portions of the upper and lower piles by a very simple operation by fastening with the fastening means.

[0008]

The pile joint structure according to the present invention is a technique that fundamentally improves the above-mentioned conventional problems, and the gist of the first invention is the lower end of the upper pile and the lower pile. In the joint structure of the pile, the upper ends of the piles are in contact with each other, and a plurality of split rings are fitted to the outer peripheral portion of the contacting portions to connect the upper pile and the lower pile to each other. Along the outer circumference of the lower end of the upper pile and the upper end of the lower pile, projecting ridges protruding in the radial direction are respectively projected, and these projecting ridges are provided in the lateral groove provided on the inner peripheral surface of the split ring. A projecting piece that is fitted in and that protrudes in a radial direction is provided at each split end of the split ring, and the projecting pieces of the split rings that are close to each other are fastened by a predetermined fastening means. It is the joint structure of the pile.

Further, the gist of the second invention of the pile joint structure according to the present invention is that a tapered surface inclined to the axis is provided on one side surface of the projecting piece, and the pair of projecting pieces are fastened to each other. A vertical groove into which the pair of projecting pieces can be fitted is provided on the inner peripheral surface of the socket member, and a tapered surface corresponding to the tapered surface of the projecting piece is provided on both inner side surfaces of the vertical groove. It is the joint structure of the pile of the first invention characterized in that.

The gist of the third invention of the present invention is that end plates are attached to the pile end connecting surfaces of the upper pile and the lower pile, and the outer peripheral edges of these end plates are respectively greater than the outer peripheral surface of the pile end. It is the joint structure of the pile of the 1st invention and the 2nd invention characterized by forming a ridge part which projects in the radial direction.

The gist of the fourth invention of the present invention is that ring blocks are welded to the connection outer peripheral surfaces of the pile ends of the upper pile and the lower pile, respectively, and the ridges are formed on the outer peripheral surfaces of these ring blocks. The pile joint structure of the first invention, the second invention, and the third invention is characterized in that:

The gist of the fifth aspect of the present invention is that a groove groove for welding is provided in a ridge portion on the outer periphery of a steel end plate provided at the ends of the upper pile and the lower pile. It is the joint structure of the pile of the 1st invention, the 2nd invention, the 3rd invention, and the 4th invention.

[0013]

According to the first aspect of the present invention, a plurality of projecting ridges are provided around the lower upper ends of the upper pile and the lower pile to be joined, and are attached around the joints of the upper and lower piles. Since the protrusions are fitted in the lateral grooves provided on the inner peripheral surface of the split ring, the upper and lower piles can be joined by these split rings. Further, a projecting piece protruding in the radial direction is provided at each of the divided ends of the split ring, and a pair of projecting pieces that are close to each other are fastened to each other by a predetermined fastening means. It is possible to fix multiple split rings by tightening around the joints of upper and lower piles with a simple structure.

In a second aspect of the present invention, a taper surface inclined with respect to the axis is provided on one side surface of the projecting piece projecting at the end of the split ring, and the inner peripheral surface of the socket member is provided. A vertical groove into which two adjacent protrusions can be fitted is bored, and mutually opposite tapered surfaces corresponding to the tapered surfaces of the protrusions are provided on both inner side surfaces of the vertical groove. By fitting the projection pieces of (1) into the vertical groove of the socket member relatively deeply, the split rings adjacent to each other can be firmly connected. Therefore, when the pile is buried in the ground, the force acts so that the socket does not come out.

According to a third aspect of the present invention, end plates are attached to the pile end connecting surfaces of the upper pile and the lower pile, respectively, and the outer peripheral edges of these end plates are more than the outer peripheral surface of the pile end. Since the projections are formed by projecting in the radial direction, these projections can be fitted in the lateral grooves of the plurality of split rings mounted around the pile ends. Therefore, the end plates and the upper and lower piles to which they are connected can be connected to each other via the split ring.

In a fourth aspect of the present invention, ring blocks are welded to the outer peripheral surfaces of the pile ends connecting the upper pile and the lower pile, and the ridges are formed on the outer peripheral surfaces of these ring blocks. Since the parts are projected, these ridges can be fitted in the transverse grooves of the plurality of split rings mounted around the pile ends. Therefore, the upper and lower piles can be connected to each other via the split ring and the ring block.

In the fifth aspect of the present invention, since the groove groove for welding is provided in the ridges on the outer periphery of the end plates of the upper pile and the lower pile, the split ring is formed as described above. If is not attached to the outer peripheral portion of the end plate, the upper and lower piles can be connected to each other by welding the groove portion. As described above, providing the groove groove for welding on the outer periphery of the end plate does not cause any trouble and does not cause a trouble even when the split ring of the present invention is fitted as described above. . Further, when such a groove is provided, it can be diverted as a pile body for a welded joint.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pile joint structure according to the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional explanatory view of a side surface of the pile joint structure according to the present invention. FIG. 2 is a front view of the joint structure of FIG. Figure 3
(A) and (B) are explanatory views showing parts of essential parts of the joint structure of FIG. 1, respectively, and FIG. 4 is a sectional explanatory view of essential parts of the joint structure of FIG.
FIG. 5 is an explanatory view showing a dimension example of each component, FIG. 6 is a partial sectional explanatory view of a joint structure of another example, and FIG. 7 is a partial sectional explanatory view showing a joint structure of another example.

1 to 4, 1 is an upper pile,
2 is a lower pile. End plates 3 and 4 are fixed to the lower ends or upper ends of the upper and lower piles 1 and 2 by PC steel materials 1a and 2a, respectively, and the outer peripheral surfaces of these end plates 3 and 4 have radii respectively. The protruding portions 3a and 4a protruding in the direction are provided. Reinforcing rings 5 are wound around the outer peripheral surfaces of the ends of the upper and lower piles 1 and 2, respectively. Reference numeral 6 is a divided ring obtained by dividing the ring body into a plurality of parts, and has an inner diameter capable of contacting the outer peripheral surfaces of the pile ends of the upper and lower piles 1 and 2. Further, a lateral groove 7 into which the pair of protrusions 3a and 4a can be fitted is formed on the inner peripheral surface of each split ring 6.

A projecting piece 8 projecting in the radial direction is provided at each split end of the split ring 6 in a protruding manner. This protruding piece 8
Is a side 8a, as is apparent from FIGS. 3 (A) and 4.
Is formed parallel to the axis, and the other side 8b corresponding to this one side forms a tapered surface inclined with respect to the axis.

Reference numeral 9 denotes an arc plate-shaped socket member as a fastening means, and a vertical groove 10 into which the pair of projecting pieces 8 can be fitted is formed in the inner peripheral surface thereof. This vertical groove 10
In particular, as is apparent from FIGS. 3 (B) and 4, tapers corresponding to the tapered surfaces of the projecting piece 8 are provided on the both side surfaces, respectively. Therefore, the upper portion is wide and the width gradually decreases toward the lower portion. Is configured to be.

In the assembling construction of the joint structure of the present invention having the above construction, the split ring 6 is abutted around the end plates 3 and 4 attached to the upper and lower piles 1 and 2, and the lateral groove 7 of the split ring 6 is made. The projecting ridges 3a and 4a, which are provided on the outer peripheral surfaces of the end plates 3 and 4, are fitted therein. Next, the lower surface of the socket member 9 is abutted from below the pair of projecting pieces 8 adjacent to each other, and the pair of projecting pieces 8 is attached to the vertical groove 10 of the socket member 9.
Insert inside.

By sliding the socket member 9 upward in this state, the tapered surfaces of the vertical groove 10 and the projecting piece 8 are strongly abutted against each other, and the adjacent split rings 6 are strongly tightened to each other. Each split ring 6 can be firmly connected. Moreover, the end plates 3 and 4 and the upper and lower piles 1 and 2 to which the end plates 3 and 4 are connected can be connected to each other through the connected split ring 6. Therefore, by pulling the socket member 9 strongly upward, each split ring 6 can be firmly tightened, and the split rings 6 can firmly connect the upper and lower piles 1 and 2.

An example of the dimensions of each component in the above embodiment will be described with reference to FIG. That is, the thickness a of the convex portion on the inner peripheral surface of the split ring 6 and the depth of the lateral groove 7 are 5
mm, the remaining thickness b is 13 mm, the thickness of the protruding piece 8 projecting from the split ring 6 and the depth c of the vertical groove 10 of the socket member 9 are 5 mm, and the depth of the vertical groove 10 of the socket member 9 is 5 mm. Except for the thickness, the thickness d is 13 mm, and the vertical width e of the split ring 6 is 60 m
m, the vertical width f of the socket member 9 is 70 mm, the end plates 3, 4
Has a thickness g of 12 mm.

In the above embodiment, the end plates 3 and 4 are connected to the end faces of the upper and lower piles 1 and 2, and the end plates 3 and 4 are connected.
The outer peripheral surface of the is protruded in the radial direction to form the ridges 3a and 4a which can be fitted into the lateral grooves 7 of the split ring 6.
In another embodiment shown in FIG. 1, ring blocks 11 and 12 are provided in ring-shaped grooves provided on the outer peripheral surfaces of the pile ends of the upper and lower piles 1 and 2, respectively.
12 are welded in such a way that they are buried in the middle, and the ridges 11a, 1 are formed on the outer peripheral surfaces of the ring blocks 11, 12, respectively.
2a is projectingly provided, and these projecting ridges 11a and 12a are fitted in the lateral grooves 7 of the split ring 6. The other fastening relationship between the split ring 6 and the socket 9 is the same as in the example of FIG.

In the embodiment shown in FIG. 1, the end plates 3 and 4 are fixed to the end faces of the upper and lower piles 1 and 2 by the PC steel materials 1a and 2a, and the end plates 3 and 4 are fixed. The outer peripheral surface of the ring is projected in the radial direction to form the ridges 3a and 4a which can be fitted into the lateral grooves 7 of the split ring 6. However, in another embodiment shown in FIG. , 4 are provided on the outer circumferences of the projections 3a, 4a protruding in the radial direction, respectively, on the pile end side outer circumferences, and welding groove grooves 3b, 4b are provided adjacent to the end surfaces of the end plates 3, 4, respectively. are doing. The other split ring 6 and the socket member 9 are the same as in the embodiment of FIG.

Therefore, in the embodiment shown in FIG. 7, by using this groove groove 3b, 4b and welding this portion, the upper pile 1 and the lower pile 2 are welded to each other. Can be connected. As described above, when the split ring 6 and the socket member 9 are not used to connect the upper pile 1 and the lower pile 2, the upper and lower piles 1 and 2 can be fastened only by this welding. . When the upper and lower piles 1 and 2 are connected by using the split ring 6 and the like together with welding,
It is possible to strengthen the bond between the two. Further, it is easy to provide these groove grooves 3b, 4b on the end plates 3, 4 of the upper and lower ends 1, 2, and these groove grooves 3b, 4b interfere with the use of the split ring 6 and the like. There is no such thing.

[0028]

Since the pile joint structure according to the present invention has the above-described structure and operation, it has the following great effects.

(1) The plurality of split rings abutting on the outer peripheral surfaces of the connecting portions of the upper and lower piles can be connected to each other by using a fastening means having a light and extremely simple structure.
(2) Therefore, it is possible to extremely simplify and facilitate the pile joint work in the field. (3) When the projecting pieces are respectively provided on the split ends of the split ring and the grooves into which the two adjacent projecting pieces can be fitted are provided on the inner surface of the socket member which is the fastening means, the projecting pieces are adjacent to each other. By fitting the pair of protruding pieces into the vertical groove, each split ring can be fastened via the socket member.

(4) When a tapered surface is provided on one side surface of the projecting piece and tapered surfaces are provided on both inner side surfaces of the vertical groove, by making these tapered surfaces deeply coincide with each other, the socket member can be formed. A plurality of divided sockets can be firmly fastened. (5) The ridges projecting on the outer peripheral surfaces of the pile ends of the upper and lower piles may be formed by projecting the end plates themselves connected to the pile ends, or the outer circumference of the ring block welded around the pile ends. It is also possible to form a part of the protrusion.

(6) When a groove is provided on the end plate of the pile, the pile can be connected by welding the groove. Alternatively, the piles can be connected more firmly by using welding and a split ring together. Further, the groove provided on the end plate does not prevent the use of the split ring or the like.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional explanatory view of a side surface of a pile joint structure according to the present invention.

FIG. 2 is a front view of the joint structure of FIG.

3 (A) and 3 (B) are explanatory views showing essential parts of the joint structure of FIG. 1, respectively.

FIG. 4 is a cross-sectional explanatory view of a main part of the joint structure of FIG.

FIG. 5 is an explanatory diagram showing a dimension example of each component.

FIG. 6 is a partial cross-sectional explanatory view of a joint structure of another example.

FIG. 7 is a partial cross-sectional explanatory view showing a joint structure of still another example.

FIG. 8 is a partial cross-sectional front view showing a joint structure for a pile of a conventional example.

FIG. 9 is a partial sectional front view showing another conventional joint structure.

[Explanation of symbols]

1 Upper pile 2 Lower pile 1a, 2a PC steel 3,4 End plate 3a, 4a Protruded ridge 3b 4b Groove 5 Reinforcement ring 6 Dividing ring 7 Lateral groove 8 Projection 8a One side 8b Other side 9 Socket member 10 Vertical groove 11, 12 ring block 11a, 12a ridge 51 upper pile 52 lower pile 53,54 end plate 55,58 ridge 56,57 ring block 59 split ring 60 lateral groove 61 outer ring

Claims (5)

[Claims] 1. The lower end of the upper pile and the upper end of the lower pile are brought into contact with each other, and a plurality of split rings are fitted to the outer peripheral portion of the abutting portion so that the upper pile and the lower pile are connected to each other. In the joint structure of the piles, projecting ridges protruding in the radial direction are respectively provided along the outer circumferences of the lower end of the upper pile and the upper end of the lower pile, and these projecting ridges are formed on the split ring. Projecting pieces that are fitted in the lateral grooves provided on the inner peripheral surface and project in the radial direction at each of the split ends of the split ring, and the projecting pieces of the split rings that are close to each other have a predetermined shape. A joint structure for piles characterized by being fastened by fastening means. 2. A taper surface inclined with respect to an axis is provided on one side surface of the projecting piece, and the pair of projecting pieces is provided on an inner peripheral surface of a socket member which is a fastening means capable of fastening the pair of projecting pieces to each other. 2. The pile according to claim 1, further comprising: a vertical groove into which the protruding piece can be fitted, and tapered surfaces corresponding to the tapered surfaces of the protruding piece are provided on both inner side surfaces of the vertical groove. Joint structure. 3. An end plate is attached to each of the pile end connection surfaces of the upper pile and the lower pile, and the outer peripheral edges of these end plates respectively project in the radial direction from the outer peripheral surface of the pile end. The pile joint structure according to claim 1 or claim 2, wherein the joint structure is formed. 4. A ring block is welded to each outer peripheral surface of the pile ends connecting the upper pile and the lower pile, and a ridge portion is provided so as to project on the outer peripheral surface of these ring blocks. The pile joint structure according to claim 1 or 2, wherein 5. A groove groove for welding is provided in a ridge portion of an outer circumference of a steel end plate provided at an end portion of the upper pile and the lower pile. 2, The pile joint structure according to claim 3 and claim 4.